Improvement in envelopes



@met @emita FRANCIS W. EBERMAN, .or WEST. SALEM, ILLINOIS.

Letters Patent No. 96,566-, dated November 9, 186?.

IMPROVEMENTV IN ENVELQPES.'

The Schedule referred to in these Letters Patent' and making part of the lame.

To all 'whom lit may eoue'm'a.-

Be it known that I, FRANCIS IV. EBERMAN, of West Salem, in the county of' Edwards, and State of Illinois, have invented a new and useful Improvement in Envelopesyand I do hereby declare that the following isa full, clear,- and exactdescription thereof', which will enable others skilled iu the art to make and use-the same, reference being had to the accompanying drawings, forming part ot' this specification.

` This invention relates to mprovementsin letterenvelopes, and has for its object to provide a simple and cheap arrangement whereby they maybe more readily opened than as now made.

The inventionv consists in making the 'fiap which is folded over on the body-part in sealing, of two thick# nesses, either by folding the edges ofthe ilap"(extended ihr the purpose) overwon itself, o1 by pasting other narrow strips thereon, and arranging the paste on the flap or theother part so that it will be pasted do'wn to the body-part at some distance from the edge of the flap,

leaving a narrow stnp of the outer edge free to be taken hold of by the thumb and finger for tearing open, the two thicknesses thus formed rendering the paper stron g enough to overcome the adhesion of the paste.

In some cases, I propose,when the additional thickness of paper is to be formed by pasting on strips,to attach the said strips to the body of the envelope, 'and to seal the edge of the'tlaps to the strips.

Figure 1 represents a plan of an envelope, with a strip attached to the body, in such a way that the edge which coincides wit-h the edge of the ilap when sealed to it, will be unattached for a suiicient distance to admit. of being readily grasped, together with the Hap, by the thumb and linger, for tearing the envelope` open;

Figure 2 represents a transverse section ofthe same Figure 3 represents a plan View of an envelope, showing the strip when formed by folding over an extension of the edge of the Hap; and Figure 4 is a transverse section of the same. Similar letters of reference indicate corresponding parts.

Infig. 1, the envelope is shown as constructed in the ordinary way, and having a curved strip of paper, A, secured to the'side B ofthe body at the edge, over which the iiap C closes in sealing. 'lhis strip, so pasted to the part B that that edge with which the edge of the flap O coincides when folded over, is unconnected, as clearly represented in fig. 2,

so that the free edge of' the strip A, together with the flap C, may be taken hold of to tear the envelope open."

Instead of pasting this strip on the part B of the envelope, it may be pasted to the edge of the iiap` C, in which case' it'vill be prepared with g'nm 0I' paste, so arranged `that when the flap is folded over, and the said strip ,pasted to thepart B, it will assume the same over, as represented in ligs. 3 and 4, to be pasted nearA the inneredge, as at a,for sealing to thepart B, so

'that the edge of the flap will be free to take hold of for teaIiagPopen. v

I am aware that in some measure the same results may be had without the strips or the extensions, by arranging the paste either -on theuap or the part B, so that when the flap is folded down, the edgefor a suficient space'would be free to be taken hold of,hnt practically the. required results cannot be obtained by this arrangement, for thereason that the adhesion of the paste is greater than the strength of the paper, and consequently the latter tears oli" Without opening the envelope.

To insure -not pasting the flaps onto the enclosure,

the part B should extend nearer to the base of the ilap -G than in the common construction, or the ap'- may be made broader.

aving thus described my invention,

I claim as new, and desire to secure Patent- Securing thellap C, and an intervening strip, A or l A', to the part B, so that the edge of the flap and the said` strips will be unattached t'or the di'stnceof a by Letters 

